Crystal growth and physical properties of shape-controlled La 3Ta 0.5Ga 5.5O 14 single crystals by micro-pulling-down method

Yuui Yokota, Masato Sato, Yoshisuke Futami, Kazushige Tota, Takayuki Yanagida, Ko Onodera, Akira Yoshikawa

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12 Citations (Scopus)


Columnar-shaped La 3Ta 0.5Ga 5.5O 14 single crystals with a-axis and c-axis crystal orientations along the growth direction grown by the micro-pulling-down method and their physical properties were investigated. All diffraction peaks of the XRD pattern were identified as the langasite-type structure and the a-axis and c-axis lengths were a=8.239 Å and c=5.124 Å, respectively. In the XRC measurement, a relatively sharp single peak was observed in the ω scan and the full width of half maximum was 82.1 arcsec. According to the chemical analysis by the EPMA system, the main phase was composed of LTG with the cation ratio of La:Ta:Ga=3.31:0.465:5.22 and the LTG crystal included secondary phase, La-Ta-O system, in the periphery area. The piezoelectric constant d 11 that was measured using the plate-shape LTG crystal was 6.7 pC/N.

Original languageEnglish
Pages (from-to)147-150
Number of pages4
JournalJournal of Crystal Growth
Issue number1
Publication statusPublished - 2012 Aug 1


  • A1. X-ray diffraction
  • A2. Growth from melt
  • A2. Single crystal growth
  • B1. Oxides
  • B2. Piezoelectric materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry


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